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US4055780A Thermionic emission cathode having a tip of a single crystal of lanthanum hexaboride 失效
具有六硼化镧单晶尖端的热电子发射阴极

Thermionic emission cathode having a tip of a single crystal of
lanthanum hexaboride
摘要:
A single crystal of lanthanum hexaboride is used as a tip of a thermionic emission cathode.
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